Evaluation of Vertical-Flow Constructed Wetlands for Swine Wastewater Treatment |
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| Authors: | Antover Panazzolo Sarmento Alisson Carraro Borges Antonio Teixeira Matos |
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| Institution: | 1.Department of Agricultural Engineering,Federal University of Vi?osa,Vi?osa,Brazil;2.Department of Civil Engineering,Federal University of Goiás,Catal?o,Brazil |
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| Abstract: | In this study, the role of Cyperus sp. was evaluated for removal of pollutants from swine wastewater. Vertical-flow pilot scale constructed wetlands (CWs) operating with a hydraulic retention time (HRT) of 72 h were monitored in a greenhouse, located in Viçosa, Brazil. Significant differences were observed for the following parameters: Kjeldahl nitrogen, total phosphorus, alkalinity and electric conductivity, with averages removals of 37.5 and 28.5%, 55.9 and 44.4%, 30.2 and 25.6 and 26.1% and 22.9% (for planted and unplanted CWs, respectively). The rate of dry matter yield from Cyperus sp. was 7.5 g?m?2 day?1, and the nutrient uptake capacities were 21.8, 2.1, 14.0 and 0.9 g?m?2 of N, P, K and Na, respectively. Evapotranspiration (2.7 mm day?1) was statistically higher in the planted CWs. Plants in the CWs are important for achieving high nutrient removal. |
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